U.S. patent number 8,373,600 [Application Number 12/896,208] was granted by the patent office on 2013-02-12 for single-band antenna.
This patent grant is currently assigned to Arcadyan Technology Corporation. The grantee listed for this patent is Jin-Su Chang. Invention is credited to Jin-Su Chang.
United States Patent |
8,373,600 |
Chang |
February 12, 2013 |
Single-band antenna
Abstract
A single-band antenna, comprising: a substrate; a first
radiation unit; a conductive material; an impedance matching
circuit; a signal feed-in terminal; a second radiation unit; and a
wire connecting unit. Therefore, the single-band antenna can be
miniaturized to be installed with or inside a compact wireless
transmission device with enhanced transceiving performance.
Inventors: |
Chang; Jin-Su (Hsinchu County,
TW) |
Applicant: |
Name |
City |
State |
Country |
Type |
Chang; Jin-Su |
Hsinchu County |
N/A |
TW |
|
|
Assignee: |
Arcadyan Technology Corporation
(Hsinchu, TW)
|
Family
ID: |
43357101 |
Appl.
No.: |
12/896,208 |
Filed: |
October 1, 2010 |
Prior Publication Data
|
|
|
|
Document
Identifier |
Publication Date |
|
US 20110080324 A1 |
Apr 7, 2011 |
|
Foreign Application Priority Data
|
|
|
|
|
Oct 2, 2009 [TW] |
|
|
98133580 A |
|
Current U.S.
Class: |
343/700MS;
343/702; 343/895 |
Current CPC
Class: |
H01Q
1/243 (20130101); H01Q 1/38 (20130101); H01Q
9/42 (20130101) |
Current International
Class: |
H01Q
1/38 (20060101) |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Dinh; Trinh
Attorney, Agent or Firm: WPAT PC King; Justin
Claims
What is claimed is:
1. A single-band antenna, comprising: a substrate being provided
with a first side and a second side; a first radiation unit being a
zig-zag pattern disposed on the first side; a conductive material
being disposed on the first side; an impedance matching circuit
being disposed on the first side to electrically connect the first
radiation unit and the conductive material; a signal feed-in
terminal being disposed on the first side and being coupled to the
first radiation unit; a second radiation unit being disposed on the
second side; and a wire connecting unit being disposed in the
substrate to electrically connect the first radiation unit and the
second radiation unit.
2. The single-band antenna as recited in claim 1, wherein the first
side and the second side are two symmetric planes of the
substrate.
3. The single-band antenna as recited in claim 1, wherein the first
side and the second side are symmetric and non-coplanar.
4. The single-band antenna as recited in claim 1, further
comprising a coaxial cable electrically connected to the signal
feed-in terminal for signal transmission.
5. The single-band antenna as recited in claim 1, further
comprising a micro-strip line electrically connected to the signal
feed-in terminal for signal transmission.
6. The single-band antenna as recited in claim 1, further
comprising a coplanar waveguide electrically connected to the
signal feed-in terminal for signal transmission.
7. The single-band antenna as recited in claim 1, wherein the
substrate, the first radiation unit, the conductive material, the
impedance matching circuit and the signal feed-in terminal are
formed in one process.
8. The single-band antenna as recited in claim 1, wherein the
substrate is a printed circuit board.
9. The single-band antenna as recited in claim 1, wherein the first
radiation unit comprises a first terminal and a second terminal and
the zig-zag pattern is disposed between the first terminal and the
second terminal.
10. The single-band antenna as recited in claim 9, wherein the wire
connecting unit is connected to the first terminal of the first
radiation unit.
11. The single-band antenna as recited in claim 9, wherein the
signal feed-in terminal is connected to the second terminal of the
first radiation unit.
12. The single-band antenna as recited in claim 1, wherein the
impedance matching circuit and the first radiation unit are
connected near the signal feed-in terminal.
13. The single-band antenna as recited in claim 1, wherein the
conductive material is a grounding plane.
Description
RELATED APPLICATIONS
This application claims priority under 35 U.S.C. 119 from TAIWAN
application 098133580 filed Oct. 2, 2009, the contents of which are
incorporated herein by references.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention generally relates to a single-band antenna
and, more particularly, to a single-band antenna that can be
miniaturized to be installed with or inside a compact wireless
transmission device with enhanced transceiving performance.
2. Description of the Prior Art
In highly developed modern days, to meet the requirement for
communications, there have been reported compact antennas used in
more-and-more compact hand-held electronic devices such as mobile
phones or notebook computers or wireless communication devices such
as access points (APs). However, the currently available
single-band antenna suffers from effective operating bandwidth
insufficiency due to its poorly designed structure that limits its
transceiving performance.
Therefore, there exists a need in providing a single-band antenna
that can be miniaturized to be installed with or inside a compact
wireless transmission device with enhanced transceiving
performance.
SUMMARY OF THE INVENTION
It is one object of the present invention to provide a single-band
antenna that can be miniaturized to be installed with or inside a
compact wireless transmission device with enhanced transceiving
performance.
In order to achieve the foregoing object, the present invention
provides a single-band antenna, comprising: a substrate being
provided with a first side and a second side; a first radiation
unit being a zig-zag pattern disposed on the first side; a
conductive material being disposed on the first side; an impedance
matching circuit being disposed on the first side to electrically
connect the first radiation unit and the conductive material; a
signal feed-in terminal being disposed on the first side and being
coupled to the first radiation unit; a second radiation unit being
disposed on the second side; and a wire connecting unit being
disposed in the substrate to electrically connect the first
radiation unit and the second radiation unit.
Preferably, the first side and the second side are two symmetric
planes of the substrate.
Preferably, the first side and the second side are symmetric and
non-coplanar.
Preferably, the signal feed-in terminal is connected to the second
terminal of the first radiation unit.
Preferably, the impedance matching circuit and the first radiation
unit are connected near the signal feed-in terminal.
Preferably, the conductive material is a grounding plane.
Preferably, the single-band antenna further comprises a coaxial
cable electrically connected to the signal feed-in terminal for
signal transmission.
Preferably, the single-band antenna further comprises a micro-strip
line electrically connected to the signal feed-in terminal for
signal transmission.
Preferably, the single-band antenna further comprises a coplanar
waveguide electrically connected the signal feed-in terminal for
signal transmission.
Preferably, the substrate, the first radiation unit, the conductive
material, the impedance matching circuit and the signal feed-in
terminal are formed in one process.
Preferably, the substrate is a printed circuit board.
Therefore, the single-band antenna can be miniaturized to be
installed with or inside a compact wireless transmission device
with enhanced transceiving performance.
BRIEF DESCRIPTION OF THE DRAWINGS
The objects, spirits and advantages of the embodiment of the
present invention will be readily understood by the accompanying
drawings and detailed descriptions, wherein:
FIG. 1 is a front view of a single-band antenna according to one
embodiment of the present invention;
FIG. 2 is a rear view of a single-band antenna according to one
embodiment of the present invention;
FIG. 3 is a 3-D view of a single-band antenna according to one
embodiment of the present invention;
FIG. 4 shows the relation of measured voltage-standing-wave ratio
(VSWR) to frequency from 2 GHz to 3 GHz according to the preferred
embodiment of the present invention;
FIG. 5A shows the field pattern of a single-band antenna at 2.4 GHz
on the X-Y plane according to the preferred embodiment of the
present invention;
FIG. 5B shows the field pattern of a single-band antenna at 2.45
GHz on the X-Y plane according to the preferred embodiment of the
present invention;
FIG. 5C shows the field pattern of a single-band antenna at 2.5 GHz
on the X-Y plane according to the preferred embodiment of the
present invention;
FIG. 6A shows the field pattern of a single-band antenna at 2.4 GHz
on the Y-Z plane according to the preferred embodiment of the
present invention;
FIG. 6B shows the field pattern of a single-band antenna at 2.45
GHz on the Y-Z plane according to the preferred embodiment of the
present invention; and
FIG. 6C shows the field pattern of a single-band antenna at 2.5 GHz
on the Y-Z plane according to the preferred embodiment of the
present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The present invention can be exemplified by the embodiment as
described hereinafter.
FIG. 1, FIG. 2 and FIG. 3 are respectively a front view, a rear
view and a 3-D view of single-band antenna according to one
embodiment of the present invention. Referring to FIG. 1, FIG. 2
and FIG. 3, the present invention provides a single-band antenna 1,
comprising: a substrate 2 (for example, a printed circuit board); a
first radiation unit 3; a conductive material 4; an impedance
matching circuit 5; a signal feed-in terminal 6; a second radiation
unit 7; and a wire connecting unit 8.
The substrate 2 is provided with a first side and a second side.
The first side and the second side can be two symmetric and/or
non-coplanar planes of the substrate. The first radiation unit 3 is
disposed on the first side. The first radiation unit 3 is a zig-zag
pattern. Generally, the first radiation unit 3 comprises a first
terminal and a second terminal, and the zig-zag pattern is disposed
between the first terminal and the second terminal. The conductive
material 4 is disposed on the first side. The conductive material
is typically a grounding plane. The impedance matching circuit 5 is
disposed on the first side to electrically connect the first
radiation unit 3 and the conductive material 4 for grounding so as
to adjust the position where the impedance matching circuit 5 and
the first radiation unit 3 are electrically connected, to change
the position where the impedance matching circuit 5 and conductive
material 4 are electrically connected, or to change the length or
width of the impedance matching circuit 5. Thereby, the impedance,
the band-width and the standing wave ratio of the antenna can be
changed. The signal feed-in terminal 6 is disposed on the first
side and is coupled to the first radiation unit 3. For better
transmission performance, it is preferable that the single-band
antenna 1 further comprises a coaxial cable, a micro-strip line or
a coplanar waveguide electrically connected to the signal feed-in
terminal 6. The signal feed-in terminal 6 and the impedance
matching circuit 5 are not overlapped. More particularly, the
impedance matching circuit 5 and the first radiation unit 3 are
connected near the signal feed-in terminal 6. The second radiation
unit 7 is disposed on the second side. The length of the second
radiation unit 7 is not limited and can be adjusted according to
practical use. The wire connecting unit 8 is disposed in the
substrate 2 to electrically connect the first radiation unit 3 and
the second radiation unit 7. Preferably, the wire connecting unit 8
is connected to the first terminal of the first radiation unit 3.
The signal feed-in terminal 6 is connected to the second terminal
of the first radiation unit 3. Generally, it is preferable that the
substrate 2, the first radiation unit 3, the conductive material 4,
the impedance matching circuit 5 and the signal feed-in terminal 6
are formed as a metal structure in one process to achieve better
performance with lowered manufacturing cost of the single-band
antenna.
FIG. 4 shows the relation of measured voltage-standing-wave ratio
(VSWR) to frequency from 2 GHz to 3 GHz according to the preferred
embodiment of the present invention. Referring to FIG. 4, in the
working frequency range from 2.4 GHz to 2.5 GHz of currently
available wireless products, it shows that the single-band antenna
of the present invention exhibits excellent transceiving
performances. More importantly, the single-band antenna of the
present invention is more compact than conventional single-band
antennas.
FIG. 5A to FIG. 5C show the field pattern of a single-band antenna
at 2.4 GHz, 2.45 GHz and 2.5 GHz on the X-Y plane according to the
preferred embodiment of the present invention. In FIG. 5A to FIG.
5C, the single-band antenna of the present invention exhibits
excellent transceiving performances on various planes and along
various orientations.
FIG. 6A to FIG. 6C show the field pattern of a single-band antenna
at 2.4 GHz, 2.45 GHz and 2.5 GHz on the Y-Z plane according to the
preferred embodiment of the present invention. In FIG. 6A to FIG.
6C, the single-band antenna of the present invention exhibits
excellent transceiving performances on various planes and along
various orientations.
Accordingly, the present invention provides a single-band antenna
antenna that can be miniaturized to be installed with or inside a
compact wireless transmission device with enhanced transceiving
performance. Therefore, the present invention is novel, useful and
non-obvious.
Although this invention has been disclosed and illustrated with
reference to particular embodiments, the principles involved are
susceptible for use in numerous other embodiments that will be
apparent to persons skilled in the art. This invention is,
therefore, to be limited only as indicated by the scope of the
appended claims.
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